Filter to be attached around user&#39;s waist for purifying air in a supplied air breathing system for use in otherwise hazardous environments



FIG. 1 is a front elevation view of a filter to be attached arounduser's waist for purifying air in a supplied air breathing system foruse in otherwise hazardous environment showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a filter to be attached around user's waistfor purifying air in a supplied air breathing system for use inotherwise hazardous environments, as shown.